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Fire Technology

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24.01.2022

Improving the Fire Performance of Structural Insulated Panel Core Materials with Intumescent Flame-Retardant Epoxy Resin Adhesive

verfasst von: Kaiyuan Li, Yanjiao Li, Yanyan Zou, Bihe Yuan, Anna Walsh, David Carradine

Erschienen in: Fire Technology | Ausgabe 1/2023

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Abstract

The effects of adhesive (layer) on fire performances of structural insulated panel (SIP) have been mostly ignored. This research studied modifications to the epoxy resin adhesive (EA) with expandable graphite (EG), ammonium polyphosphate (APP) and calcium carbonate (CaCO₃) to prepare an intumescent flame-retardant epoxy resin adhesive (FREA) which was applied to expanded polystyrene (EPS), a typical core material of SIPs. It was found that the FREA had a char yield of 33% which was 7.6 times of that of EA and a higher viscosity than EA. The limiting oxygen index reached a maximum of 37.7% and UL94 passed the V-0 rating when the EPS was coated with FREA, of which the fire performance was even better than flame-retardant EPS. Additionally, the heat release rate, production rates of CO, CO₂ and soot and sample back temperatures were all reduced compared to the EPS coated with EA. Avoiding the sample surface recession in the cone calorimeter, the custom-made spray gun system proves that the FREA can significantly increase the ignition time and lead to self-extinguishment. The degradation products of APP crosslink with CaCO₃ to produce phosphates which bond with expanded EG forming the char layer to prevent heat and flame. The use of flame-retardant adhesives can lead to a sufficient fire safety level for the core material without affecting its functions.

Vorheriger Artikel Facade Fire Hazards of Bench-Scale Aluminum Composite Panel with Flame-Retardant Core

Nächster Artikel Effect of Parallel Curtain Walls on Upward Flame Spread Characteristics and Mass Loss Rate Over PMMA

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Titel: Improving the Fire Performance of Structural Insulated Panel Core Materials with Intumescent Flame-Retardant Epoxy Resin Adhesive
verfasst von: Kaiyuan Li
Yanjiao Li
Yanyan Zou
Bihe Yuan
Anna Walsh
David Carradine
Publikationsdatum: 24.01.2022
Verlag: Springer US
Erschienen in: Fire Technology / Ausgabe 1/2023
Print ISSN: 0015-2684
Elektronische ISSN: 1572-8099
DOI: https://doi.org/10.1007/s10694-021-01203-0

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